Asbestos fiber analysis results, H.S. of Economics & Finance, Apr

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 L.ah Group #: 735 1 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm' GRID BOX: MsgHificSlioilL 20 000 GRID ID: Accelerating Y'oltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/7/02

.Analysis Performed By: __ MICHAEL GORYCKI

GO, Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 u )>=5p Chrys Amphibole Nonasb Ambig/ND n, <7 No Coord <5u Elements)

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Struct = > 0.5)1 > 5; 1 Aspect Ratio Gnc acceptance; v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or foldeo Totals <10% particulate coverage >50% coverage ate laboratory identificaticn criteria ooserved least 20 unfolded or overlapped grid squares <5% [ F I B j C j M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole j F = Single Fiber Amosite E = Sundle l<3 fibers <1 fiber diameier apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M - Matrix I Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03459962 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179557